Interlocking relay.



CPB

of cam 27 The stop :25 on segment 5 will engage the interlocking cam 27and move it to the position-shown in Fig. l.

When magnet 2 becomes denergized the segment et will rotate in a counterclockwise direction, due to gravity, opening its front contacts lll.

The stop '24- will engage the interlocking me nber 26 and rotate it tothe positionA shown in Fig. 4.

It will be seen that face 2'!) of member 2G will engage with the face 30of member 27, thereby interlocking this side of the relay and preventingthe segment i from completing its stroke and closing its back contacts1G.

Should the magnet 3 now again become energized, the segment 5 will berotated in a counter clockwise direction, opening its front contacts andcarrying its stop 25 to the position shown at in Fig.

However, it will be seen that interlocking cam QT is still retained inits interlockingr position, owing to the tact that the point 31 latchedbehind the projection 32 of cam 2G.

pon the renergization of the magnet `2, the segment 4 will be rotated ina clockwise direction, there-by closing its front contacts e andcarrying its stop 24 to the vposition i shown in Fig. l, theinterlocking member 26 following the stop 2l due to the action ofgravity. It will be seen that this will now release the interlockingmember 27, and that this member will also rotate by means of `gravityuntil it engages with its stop 25.

The relay has now reassumed its normal energized condition, havingpassed through a complete cycle of operation. It is obvious that thiscycle of operations will be similar .vhichevenmagnet is lenergizedfirst.

While I have shown one specific type of relay and method of applying myinvention to the same. I do not wish to be restricted to this specifictype of relay and particular construction. 'as it is obvious that theinvention is susceptible to a variety of modifications.

Having described my invention what I claim as new and des-ircv to secureby Letters Patent iszl. In n relay, the combination of rotatable shafts.means tor causing the partial rotation ot' said shafts to controlelectric circuits, and nn-mbcrs pivotally mounted upon said shafts inoperative relation and adapted to restrict thc movement of one ,of saidshafts according` to their sequence of operation.

L". In a relay, thc combination of rotatable shai'ts n'reans for causingthe partial rotation or said shafts to control electric circuits, andinici-halting means between lthe shafts, consisting ot' double arcuatefaced members so pivotally disposed as to limit the movement of one ofsaid shafts according to their sequence of operation.

3. Ina relay, the combination of rotatable shafts, means for causing`the partial rotation of said shafts to control electric circuits,interlocking members pivotal] y mounted upon said shafts in operativerelation and adapted to restrict the movement of one of said shaftsaccording to their sequence of operation, and means associated with themembers for retaining the members in the interlocked posit-ion after thereturn of one of the shafts.

4. In a relay, the combination of two rota table shafts, means forcausing the partial rotation of said shaftsv to control electriccircuits, and two members pivotally mounted in operative relation, eachof which is adapted to be thrown into operative position by movement ofone of the shafts and to operate when in such position, to restrict themovement ot theother shaft.

5. In an interlocking relay, the combina tion of twoelectricallyoperated devices ope 'ating to control electric circuits,two niembers cooperatively related and pivotally mounted in freerelation to the operated devices having eoacting arcuate faces sodisposed as to restrict the full movement of one or the other of thesaid electrically. operated devices in accordance with their,r sequenceot' operation, and means associated with the operating device to controlthe operation of said members.

G. In a relay, the combination of two rotatable shafts, means forcausing the partial rotation of said shafts to control electriccircuits, two members pivotally mounted in operative. relation, each ofwhich is arranged to be thrown into operative position by movement ofone of the shafts and to operate when in such position, to restrict theInovement. ot' the other shaft, and means on the members forretainiugthe samein the interlocked position after the return of one ofthe shafts.

"7. In au interlocking relay, the combination-oi"` two electricallyoperated devices op erating to control electric circuits, two pivotallymounted members havingl coacting arcuate faces so disposed as torestrict the full movement ot' one of the said electrically operateddevices and adapted to be operated Iby Said devi'es', and meansassociated with the members Yfor retaining the members in theinterlocked position after the return of one of the devices.

In testimony wheref I have signed my name to this specification.

oscAR s. FIELD.

